Patch changes

Patch 3.1.0 (14-Apr-2009): Does no damage and has only one rank. This ability will now spread disease centered on a position between the death knight and its target, rather than the target’s center position (for very large creatures, this used to cause no disease spread at all).

Patch 3.0.8 (2009-01-20): No longer has a 10 seconds cooldown. The diseases will now spread correctly even when the damage from Pestilence kills the primary target.